Belt plane



April 15, 1930. w` HAGSTRQM BELT PLANE Filed Oct. 25, 1926 5 Sheets-Sheet l April 15, 1930. w. HAGsTRoM BELT PLANE Filed Oct. 25. 1926 5 Sheets-Sheet 2 April l5, 1930. w. HAGsTRoM BELT PLANE Filed Oct. 25, 1926 3 Sheets-Sheet 3 Patented Apr. 15, 1930 UNITED STATES WILLIAM HAGSTROM, OF LINDSBORG, KANSAS BELT PLANE Application led October 25, 1926'. Serial No. 143,885.

My invention relates to belt planes and has for its object an improved device for preparing the two ends of a belt so that they may be cemented together.

5 In the accompanying drawings- Fig. 1 is a plan of the machine showing a piece of belt held in position to have its end planed down to form a taper thereon;

Fig. 2 is a side elevation;

Fig. 3 is an enlarged front elevation;

Figs. 4 and 5 are enlarged sections on lines 4 4 and 5 5, respectively, of Fig. 1;

Fig. 6 is a similar section with a different tool inthe machine;

Fig. 7 is a rear elevation of Fig. 6;

Fig. 8 is another section similar to Figs. 5 and 6, but with a third form of tool in place; and

Fig. 9 is a plan of the tool shown in Fig. 8.

The base board 11 is secured by bolts or other convenient means to a metallic base 12, which in turn is secured in any convenient manner to a bench or pedestal 13. On the base 12' are bosses 14 in which are secured 25 studs15, and mounted to slide on these studs is a casting 16 which is located transversely above the rear portion of the board 11. The parts of the casting 16 thru which the studs pass are in the form of bosses 17.

Between the bosses 14 and 17 are springs 18 which act to lift the casting away from the board 11, and on the upper ends of the studs are hand wheels 19. The wheels 19 have threaded hubs which operate on the threads ot the studs 15. The parts 15 to 19 constitute a clamp by which a belt B is secured to or released from the board 11. The release is by the springs 18 moving the casting 16 upward when the` hand wheels 19 are turned 40 in a release direction.

On the casting 16 adjacent to the bosses 17 are horizontal bosses 20, and secured in these bosses by nuts 21 are guide rods 22 which are parallel with and above and on opposite sides of the board 11.

On the lower tace of the board 11 at its front end is a transverse bar 23 held in place by screws 24. Extending thru the bosses on the ends of the bar 23 are bolts 25 having 50 heads26 adjacent to the upper edge of board ll, and extending thru the heads 26 is a rod 27 parallel to the bar 23 and adjacent to the upper face of the board 11. Small hand wheels 28 on the lower ends of bolts 25 serve as nuts to clamp the rod 27 against the upper face of the board 11. Springs 29,a between the ends of the bar 23 and heads 26 on bolts 25 serve to raise Vthe rod 27 above the board when the hand wheels 28 are turned in a re= lease direction. It will be evident that, upon occasion, the bar 27 may be used as a clamp in the same way that the casting 16 is used.

Mounted upon the guide rods 22 are slides 29 which are connected together by a tie rod 30. The guide rods 22 are supposed to be parallel with each other by being secured in the bosses 2O by nuts 21, but absolute parallelism in the holes receiving those rods, and absolute fits are impossible. When the slides are mounted upon the rods 22 in erecting the machine, they are moved down adjacent to the bosses 20. When they are in this position, the tie rod 30 is inserted and the set screws 3l are tightened upon the rod so as to fix the distance between the slides 29 as the same as the distance between the rods 22 at the points at which they are secured to the bosses 20.

On the ends of the transverse rod 27 are blocks 32 just outside of the heads 26 and a short distance therefrom. 'In the blocks 32 at right angles to the holes which receive the rod 27 are other holes for receiving the ends of the guide rods 22. By inspection of Fig. 3 it will be seen that the upper surface of the rod 27 cuts into the under surfaces of the rods 22, and rods 22 are notched to permit the rods to pass each other. It will be evident that this construction permits the blocks 32 andV ends of rods 22 to be moved longitudinally on the rod 27, but does not permit corresponding movements on the rods 22.

After the set screws 31 have been secured in place as previously described, the slides are moved from adjacent to the rear clamp to a position adjacent to the front clamp. If the guide rods 22 are out of parallel to any degree, bringing the carriage (composed of slides 29 and rod 30) to the front end of the device moves the outer end of one or both rods 22 to produce parallelism. When the secured thereto.

carriage is at this position, the set screws 33 are tightened to clamp the rods 22 at fixed positions on the rod 27. It will thus be seen that the apparatus contains within itself means for bringing the guide rods 22 to a degree of parallelism which will permit the carriage to move freely and easily on the guide rods.

On the guide rods 22 near their forward ends are yokes 34, and inside of these yokes is a rectangular bar 35 which rests on the top of the rods 22. In the yokes are set screws controlled by the hand wheels 36. By tightening the hand wheels 36, the yokes are secured at a fixed position on the rods 22. By loosening the wheels 36, the yokes may be slide to some other position on the rods 22. The bar 35 simply serves to hold the yokes upright when the wheels are turned to release the set screws, and the yokes serve as adjustable stops for the forward movement of the carriage.

Mounted on the guide rods 22 between the carriage and the clamp 16 are blocks 37, each having a rear leg 38 and a forward leg (Fig. 2). Each of the forward legs 39 is split longitudinally with the shaft into legs 40 and 41. (Figs. l and 4). Passing thru the legs 40 and threaded into legs 4l are screws 42 controlled by hand wheels 43. These screws serve as a means for clamping the blocks 37 to the rods 22, and a tie rod 44 serves to connect the blocks together and hold them upright. These blocks with their con* nected parts serve as an adjustable rear stop for the carriage. Soft washers 45 on rods 22 adjacent to the front and rear stops serve as cushions in arresting the reciprocations of the carriage.

Mounted in bearings 46 on slides 29 of the carriage is a shaft 47 arranged to both turn and slide in its bearings. On the ends of the shaft are handles 48 by which the shaft may be turned thru a limited arc and my be slid in its bearings. The handles 48 are also the means by which the operator reciprocates the carriage between the stops on the guide rods 22.

Secured on the shaft 47 by means of the set screws 49 is a carrier composed of a downwardly and forwardly projecting arm 50 and a eounterweight 51. Secured in the lower part of the arm 50 by riveting or otherwise is a pin 52 upon which may be placed any one of the various tools used in the machine.

Secured on the shaft 47 at a convenient point is a collar 53, and adjacent to this is a rotatable sleeve 54 having a spring arm A handle 56 on the outer end of the arm 55 serves as a means for inanually bending said arm laterally and turning it and its sleeve on shaft 47. On the face of the spring arm 55 toward the tool-carrying arm 50 is a small projection 57 (Figs. 1 and 7) which is of the same distance from the shaft 47 that the tool-carrying pin 52 is from that shaft.

Each tool has in it a transverse hole as shown at 58 in Figs. 7 and 9, for the reception of the tool-carrying pin 52. To put a tool in place, the spring arm 55 is moved by turning it upwardly away from the pin The tool is then placed upon the pin and the spring arm is returned to its previous position with the projection 57 in the outer end of the hole 58 which receives pin 52. In that position, the spring arm holds the tool against the carrying arm 50 with a moderate pressure, and at the same time permits the tool to have a pivotal motion upon the pin 52.

Various tools are used in the. machine for various purposes. The tool shown in Figs. 1, 2 and 5 is a plane of the same general characteristics as a carpenters plane, but has the frame for holding the cutting blade modified to match the structure of the machine. vWhen in place on the pin 52, the tool just about balances the counterweight 5l, and the same is true of the other tools used in the machine.

Referring to Fig. 5, when Athe cutter-carrying frame 60 is placed on the pin 52, (the center of which is represented by the center of the handle 56), the frame and its cutter will be raised and lowered by the operator moving the handles 48 to operate the machine.

On the forward end of the frame 60 is a small roller 6l having a periphery of rubber or other soft material. )When the operator lifts the handles 48, the frame 60 and roller 6l move from the full line to the dotted line position (Fig. 5), and in so doing the roller 6l strikes and rolls on the rod 30. rihe roller is simply a soft anti-friction device between frame 60 and rod 30.

On the lower part of the weight 5l is a rubber cushion 62 which engages and stops the rise of the rear end of the frame 60. Stating the matter in another way, the tie rod 3() which connects the slides 29 so as to form a tool-carrying carriage and the counterweight for overcoming the weights of the tools mounted on pin 52, act together to limit the rise of the tool from the work upon which it is to operate. lVhen the handles 48 are depressed, the frame 60 bears uniformly on the surface of the belt B being operated upon.

From the foregoing description it will be evident that the operator in operating thru the handles 48 has the same control over the cutting tool that a carpenter has over the plane he uses, and that he can use this control to form ay taper on the end of the belt as shown in Fig. 5.

Pivoted on the blocks 37 is a rod 63, and secured to this rod is a plate 64. Buttons or knobs 65 on the ends of the rod 63 permit the plate to be turned down to rest on a belt being planed, or turned back to the dotted line position shown in Fig. 5. In this latter position it rests on pins 66 carried on blocks Iii 37 (Figs. 4f and 5). Sometimes the plate 64 rests on these pins and is not in use, but at other times itis desirable to have the tool cut deeper at the beginning of the bevel or taper on the end ofthe belt. Under these latter conditions the plate lies on the belt as shown in Figs. 1 and 4. The plate 64 is pivoted on the blocks 37 which furnish the back stop for the carriage, and the rod 63 is so located that when the plate 64 is turned back, the rear end of the plane will not engage it. But when the plate 611- is turned down, the rear end of the plane rides up on this plate at the time the carriage comes against the back stop. Under these conditions, the tool will cut deeper at the beginning of the cut. It will thus be seen that the plate 64: is a `device for controlling the cutting action of the tool, which device may or may not be used as circumstances may require.

In this connection it may be noted that the present machine is sometimes used in making tapers or bevels on the ends of new belts, and sometimes on the ends of old and greasy belts. rI`he two cannot always be handled in the same way. A number of the adjustments on this machine are made for the purpose `oztadapting it for use on both new` and old belts, and on single and on double belts.

In Figs. 6 and 7 is shown a tool for making fine groove-s longitudinally in the face of the taper after the taper has been made by the tool shown in Fig. 5. rThis is used mostly on old belts and its purpose .is to provide a better hold for the cement when forming a scarf by securing two tapered faces together. The method of operating it will be evident from the drawings and the previous descriptions.

In Figs. 8 and 9 is shown a special tool for splitting the belt for a short distance so as to make what is known as a dovetail splice. In this case, after the taper has been made on the end of the belt in the ordinary Way, the belt is reversed in the machine. In this reversal, the body of the belt is clamped to the board 11 by the rod 27, and the thin edge ofthe belt is held in the clamp 16. In this position, the cut begins in the central part of the previously made bevel and is carried toward the main body of the belt. In this device, a transverse bar 662L is adjustable by a screw 67, and spring 68, and the two serve as'means for determining the angle at which the cutter 69 shall enter the face of the beveled end of the belt. The round cutterserves to make thecut square across the belt by the operator sliding the shaft axially in its bearings.` The same proceeding also serves to cause a narrow tool to make an even out on a wide belt;

On the board 11 are graduating marks 7 O which may conveniently be placed one inch apartand numbered tol represent inches of length of bevel to be out. Assuming that the rear stop composed of blocks 37 is at extreme rearward position, then if the belt is pushed under the clamp 16 until its end is adjacent to the mark which may be numbered 57 for convenience, and the clamp 16 is tightened to hold the belt, the length of the tapered portion will be five inches. If the belt is pushed up to some other mark which may be numbered 10 and the clamp closed, then the taper cut will be ten inches long. And so on for bevels of any other length. The location of these gauge marks may be determined in any convenient manner. Under the conditions assumed, the Zero mark would be ad# jacent to the cutting edge of the tool when the stop and carriage are at their extreme rear positions. It is desirable to have these gauge marks because, when two beveled ends are cemented together to form a scarf, the lengths of the bevels on the two ends should be the same.

It is to be observed that theguide rods 22 are secured to the movable and not the fixed parts of the clamps at the two ends of the board 11. If the clamping bar 16 is raised, the guide rods 22 will turn on the clamping rod 27 as a pivot, and the carriage will move in a plane slightly inclined to the surface of the board. If the bar 27 is raised while the bar 16 is stationary, then the yield in the connections for the bar 16 will permit the guide rods to turn on a pivot which will be substantially the place of connection between the guide rods and the bar `16, and the plane of the carriage movement will be inclined in the opposite direction. Normally, this shift in inclination of carriage movement is very small, but if a very thick belt is to be operated upon, then the beveled cut will be more abrupt than on a thinnerbelt. Also, if the splice between ends of belt is short, the angle is more abrupt than on long splices. In operation, the operator controls the cut by variations of pressure which he puts on the handles 18, but as the variations of inclination given to the carriage movement correspond to variations of inclinationof the bevel to be put on the end of the belt, the arrange ment adds something to the ease of handling when cutting a bevel on the end of a belt.

In operating the plane to put a bevel on the end of a belt, the belt is inserted as shown at B in Fig. 1, and the rear clamp is tightened by means of the hand wheels 7 9. In1 insert ing the belt, its forward end is brought opposite a gauge mark 70 which will represent the length of bevel desired. Assuming that the tool used is a plane like that shown in Fig. 5, the operator seizes the handles 48 and reciprocates the carriage asif he were operating an ordinary drawing knife, and presses down on the handles as he draws the carriage toward him. This tool is the same as a carpenters hand plane, and the operation of planing a bevel on the end of a belt is the `it a transverse hole b same as planing a bevel on the end of a board with the exception that the force is pulling instead of pushing. The pressure downward on the handles is the same as a carpenters pressure downward on the back of his plane.

As previously described, each tool has in which it is mounted upon the pin 52 carrie by the arm 50. If the tool is to be a scraper like that shown in Figs. 6 and 7, the spring arm 55, which is used to hold tools in place on pin 52, is turned on its pivot, the previous tool is removed and the new one placed on the pin 52 as before. The scraping is then performed by reciprocating the carriage asbefore described. If the tool is t0 be a punch for making rivet holes in a belt, it is mounted upon the pin 52 in the same wa By pushing the carriage back against t e rear stop and then pressing down on the handles 48, a hole will be punched at a given point in the belt. By releasing the clamp 16 and shifting the belt on the board 11 so that its end will come opposite some other mark 70, a second hole may be punched at a predetermined distance from the first hole, and by repeating, a series of uniformly spaced holes ma be made.

If the tool to e used is one for cutting a transverse groove in the upper face of work of any kind, the required tool is mounted on the pin 52, and the work is clamped in position. Then by moving the carriage to its rear stops and sliding the shaft 47 in its bearings, and pressing down on arms 48 at the same time, the required groove will be cut.

It will thus be seen that the machine has wide applicability for handling tools of different kinds for widely different purposes. Also, that the machine has many readily adjustable features. For example, if it is desired to have the guides inclined to an unusual degree toward the front, it is only necessary to insert a liner, as a board, between the work and the clamping bar 16. If it is desired that they be inclined in the opposite direction, it is only necessary to lturn the hand wheels 28 to permit the springs 29a to raise the rod 27. This is evident from the fact that the guides are secured to these two rods. If the guide bars get out of alinement, they may be restored to alinement by the carriage as before described.

What I claim is:

1. In a device of the class described, a clamp arranged to hold a belt at a desired position on a board, a tool for operating on the belt so held, a carriage upon which the tool is supported, handles by which the carriage is manually reciprocated, and means cooperating with t-he handles by which the operator may use said handles to control the cutting action of the tool as the carriage is reoiprocated.

l 2. In a device of the class described, means for supporting and holding the end of a belt in a fixed position, a tool arranged to operate on the end of the belt so held, a carriage for supporting the tool, guides for said carriao'e an ad'ustable stopping device arranged e a l l c o to determine the length of the cutmade by the tool, and means for manually reciprocating the carriage and at the same time controlling the cutting action of the tool.

3. In a device of the class described, a base, a board secured to said base, studs secured in the base and extending upward at each side of the board, a clamping bar mounted on said studs over the board, springs on said studs serving to raise said bar from the board, hand wheels on said studs and serving as nuts to move the bar downward to clamp a belt to the board, carriage carrying guides secured to the bar and extending lengthwise of the board and a tool carriage therefor mounted upon said guides.

4. In a device of the class described, a clamping device arranged to hold a belt to a board, guides secured t0 a movable part of said clamp, a tool-supporting carriage mounted and movable upon said guides and a tool supported in said carriage.

5. In a device of the class described, a board, a clamp secured to one end of the board and a second clamp secured to the other end, guide rods having a fixed connection to one clamp and an adjustable connection to the other clamp, a carriage consisting of a slide mounted upon each rod and provided with an adjustable connection between them an'd a tool carried by said carriage,

6. In a device of the class described, a board and means for securing a belt thereto, a carriage and guides therefor, a rotatable and slidable shaft supported in said carriage, a tool-holder mounted upon said shaft, and stopping devices so arranged that when a tool is held by the holder the rotative movement of the shaft is limited to a small arc without limiting the slidable movement.

7. In a belt plane, guides, a movable carriage mounted upon said guides, a rotatable and slidable shaft supported in said carriage, a tool-holder mounted upon the shaft and provided with a counterweight, a tool carried by the holder, and means by which the tool carried by the holder limits the rotative movement of the shaft to a small arc.

8. In a belt plane, a movable carriage and guides therefor, a shaft supported in said carriage, a tool-holder secured to said shaft and provided with a pin, and a cutting tool, said parts being so arranged that upon the tool being mounted upon said pin the rotative movement of the shaft will be limited to a small arc. A

9. In a belt plane, a movable carriageand guides therefor, a pivoted tool-holder mounte'd upon said carriage, and a tool pivoted lll) upon the tool-holder, said parts being so arranged that the presence of a tool on the toolholder limits the pivotal movements of both the tool and its holder.

10. In a belt plane, a movable carriage and guides therefor, a tool-holder pivoted on the carriage, and a cutting tool pivoted on the holder, said parts being so arranged that the tool limits the pivotal movement of the holder and the holder limits the pivotal movement of the tool.

1l. In a belt plane, a movable carriage, a pin carried by the carriage, a cutting tool pivoted upon the pin, and a spring actuated device for retaining the tool upon the pin and at the same time permitting a pivotal motion of the tool.

12. In a belt plane, a carriage, a shaft oarried by the carriage, a rigid arm secured to the shaft and having a pin at its outer end7 a tool pivoted upon the pin, and a spring arm pivoted upon the shaft and serving to retain the tool upon its pivot pin.

13. In a belt plane, a board provided with means for securing abelt thereto, a carriage, ashaft on the carriage, an arm secured to the shaft, a cutting tool pivoted on the arm, and manually `operated means for reciprocating the carriage, said manually operated means serving also to move the tool into and out of engagement With the belt.

14. In a device of the class described, means for securing a belt in a fixed position, a tool provided With connections by which it may be moved over a portion of such belt, an adjustable stop for determining the point at which the tool engages said belt, and a de vice associated with said stop and arranged to be moved into a position to aiect the action of the tool upon the belt.

WILLIAM HAGSTROM. 

